To 'strap up' is to use a condom when having sex.
'so you been hittin 5 girls huh? did u strap up or hit that shit raw?
by liam D. April 12, 2006
2 more definitions
To arm one's self with a concealable firearm, typically a pistol.
"Hey John, you'd better strap-up. We've got to deep in the trailer park and might run into a bit of trouble before Johnny Law can come and back us up."
by TomskiPL May 30, 2013
insult to boy or girl implyig that they should sort themselfs out and behave rationaly. or oppositley, put on their strap on dildo
strap up joe
by steve the legend April 15, 2006