HEP

In the know, daddy-o

• '2,3,4' preceder

• Are You --- to the Jive?

• Cool, once

• In the old grooveroo

• With it, man

• With it

• Adjective for a cool cat

• Au courant

• Aware of what's in

• Aware, in slang

• Aware, slangily

• Cadence call

• Cadence count

• Cadence shout

• Cat starter?

• Clued in, once

• Cool

• Cool and with it

• Cool in the 50s

• Cool, '50s-style

• Cool, as a daddy-o

• Cool, in a way

• Cool, in old parlance

• Cool, in old slang

• Cool, in the '40s

• Cool, like a cat

• Cool, man

• Cool, old-style

• Cool, then

• Cool, to a bebopper

• Cool, to a cat

• Cool, to a Jazz fan?

• Cool, to a zoot suiter

• Coolly aware

• Describing a cool cat, once

• Drill bit?

• Drill sergeant's call

• Drill sergeant's intro

• Drill sergeant's shout

• Drill sergeant's word

• Drillmaster's word

• Far from square

• Groovy

• Hardly nerdy

• Hardly old-fashioned, in an old-fashioned way

• Hardly square

• Hardly squaresville

• In on familiarly

• In style, old-style

• In the groove

• In the know

• In the know, in old slang

• In the know, old-style

• In the loop

• In, back in the day

• Informed, in older slang

• Informed, in slang

• It was real gone in bygone days

• Jitterbug's cool

• Jivey

• Kind of cat

• Knowing what's up

• Knowledgeable

• Lead-in for cat

• Like '40s boppers

• Like cats in the 40's

• Like a cat of the 40's

• Like a cool cat

• Like a cool cat of the '40s

• Like a jazz cat

• Like cats, once

• Like cool cats

• Like cool cats, in '60s-speak

• Like jazz cats

• Like jazzmen

• Like some cats

• Marching syllable

• Modern, once

• Not at all square

• Not square

• Not square, once

• Not square, to a cat

• Not squaresville

• On to

• Onto the jive

• Part of a cadence count

• Plugged in

• Savvy

• Savvy about (with to)

• Sophisticated

• Sound repeated while marching

• Start of a cadence

• Start of a military march count-off

• Trendy

• Trendy, once

• Tuned in

• Type of cat

• Up on

• Up on the latest

• Up on the latest trends

• Up on things, daddy-o

• Up on things, in the '40s

• Up on trends

• Variety of cat?

• Viral inflammation, informally

• Wise

• Wise to

• Wise to the jive

• Wise, man

• Wised up

• With it familiarly

• With it, '40s-style

• With it, 50's-style

• With it, baby

• With it, in 50's slang

• with it, in the '40

• With it, in the 50's

• With it, old-style

• With it, once

• With it; cool

• With-it

• With-it, 1940's style

• Word before cat

• Word in a cadence

• Zoot-suited, say