To fullumber means to keep the passion alive in the bedroom if you are too tired to have sex when in a relationship. If you fullumber with someone you engage in the act to prepare yourself but never go any further.
When you fullumber with someone you are fullumbering.
Friend 1: What did you get up to last night?
Friend 2: ...We didn't have sex, we fullumbered.
Example 2: A couple comes out of a room, I bet they were fullumbering
A term used in the UK, commonly by people who lived through the 90's/00's and current 18-25 year olds. Most of the tunes are UK Garage, House and D&B tunes from the 90's, early-mid 00's (Bassline) and sometimes the less popular artists who still produce Bassline, House and UK Garage.
Dean: Dave mate, do you remember the bangin tunes we use to blast out of my old Fiesta back in the day?
Dave: I remember the days where we'd blast bangin tunes from artists like MJCole n stuff.