Sucks per minute (abbreviated as SPM) is how much succ a girl can give in a minute. One succ = one complete bob of the head.
"Yo how is your new girlfriend?"
"Dude she's great! She has an average rate of 87 sucks per minute (SPM)."
"No way! My girlfriend can't even get past 60 SPM."
by Mary Mary Quite The Contrarian November 6, 2021
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