the Man equivelent to a "Cougar"! Older Men who flock around bars preying on younger women! typically found in Strip Clubs, Bikini Bars or Clubs.
an old guy walks in a bikini bar. he immediately walks up to the young bartender and tries to put the moves on her. the dude doesn't realize he is 3 times her age and she just wants his cash. the jackyl is gonna get play by her.
by the Wookster January 16, 2008
Top Definition
1. American heavy metal band

Jackyl is an American heavy metal band that got recognition when it released its self-titled debut album in 1992. The album sold more than a million copies to be certified platinum by the RIAA.

Jackyl's most popular songs are:
"Kill the Sunshine"
"Down on Me"
"I Stand Alone"
and notoriously "Lumberjack" and all other tracks
Perosn A: Hey man, what'cha listening to?

Jackyl fan: Jackyl

Person A: can I hear some?

Jackyl fan: sure

Person A: Are they using a chainsaw?

Jackyl fan: yes, tonight I'm gonna go see them
by Sleez Boy March 11, 2009
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