acronym for Strictly Platonic Friend, used under these various conditions:
-the person has to actually be a CLOSE friend of an opposite sex
-your relationship has to resemble that of two romantic lovebirds' in some aspects
-yet the thought of you two as a couple makes both of you (or one of you) feel squeamish
-the person is conveniently your escort for all the shit-i-need-a-date events
A: yo, i always see you and ryan together now. are you guys dating?
B: hahha, no. he's just my spf.