b.o.b.-a-thon: when a girl comes home from a hard day and takes a nice long bath, then proceeds to have a marathon session with her favorite vibrator. Includes multiple orgasms over a 2-3 hour period.
Sunshine: So what'd you do last night, Katie?
Katie: I had a b.o.b.-a-thon, and I feel so much better today! I was at it for like three hours! Six orgasms and no stress today baby!