When you are over worked or in deep trouble. It is a variation of "knee deep in shit" but adds the assumption that it takes longer to "get" knee deep is pelican piss then it takes to with shit, thus you have been over worked or in deep trouble for a longer period of time.
I am having a long day, I am knee deep in pelican piss over that late report!
to be in knee deep means to be in a situation to a great extent, generally "knee deep in trouble". It can also be literally knee deep, for instance "knee deep in he dead" from DooM.
another term for a station wagon, mini-van, or any other kind of vehicle that is targeted at the "family" demographic(also M.A.V.)
"Tactical advantages aside, the M.A.V. is top of the line for the holy warrior troop transport manufactured by the Church of Latter Day Saints Military Industrial Complex. Also great for family trips...to heathen lands."
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.