What is Peekin?
1.
same as "spewin"; upset, annoyed, pissed-off, or all of the above.
'Dude, that party got cancelled... you must be peekin!' or
chick 1:'i got stood up last night.'
chick 2: 'peekin.'
2.
To in the giver's mouth of a bumkin.
"Hey dude."
"Yah?"
"How was that bumkin last night?"
"Oh, it was more than a bumkin, it was a peekin?"
"No way, shut the smurf up!"
"Smurf yah, all smurfin true."
See