A man with a large penis and massive testicles A jumbo Jet refers to the fact that the owner of the afore-said jumbo sized tackle is able to force a correspondingly large amount of semen from it during ejaculation
slapper:
Fuckin ell that were a feller I had last night let me tell ya! That were a proper fuckin jumbo jet I ad flying into my terminal 5 last night
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.