Top Definition
A Big5 is a meddler who tries to push their ideas down your throat.
"Got rid of that Big5, keep your eyes open in case one shows up again"
by u r a joke April 18, 2010
A penis in each hand, mouth, anus and vagina

Mate 1: Where were you last night?
Mate 2: Oi this girls was hurting for a Big 5 so we gave her one
by JaYkeO August 18, 2009

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