Reminds me of when, in my thirties, I nipped out into our road wearing a pair of skimpy bright green towelling shorts. I unexpectedly came across a neighbour who I had a crush on and we chatted for a while and then I realised with horror I would have to turn and walk back home, thus unavoidably showing a rather large underbum (although I didn't have the word for it then, I just thought fat arse too big for the shorts).
My young (female) friends (who would like to be married) who co-habit with men who are not (yet) their husbands, refer to them as "husboys" - part husband, part boyfriend .
My youngest DGS who is the most outspoken of all my DGSs is now 10yrs old and has always referred to his "bits" as his "trollies" where he got the name from we don't know but we have even used the name ourselves when speaking to him
Fraped - its what happens when someone gets into your Facebook! I prefer Facejacked which is what happens when DH leaves his computer open and our DSs come home and have fun with it!