to be extremely excited about something. or think it was awesome. or act of being excited. or to reach ejaculation.
"Dude, that game was so intense."
"Yea man, I almost peeked."
"I peeked when I aced the math test."
"That awesome dunk made me peek."
"I peeked on that girls chest."
to drink something or toke. the action of it.
"Hey lemme sap that drink."
"Don't sap that, its dirty."