It's the present participle of the verb "Reminisce", which is a synonym for the verb "Remember".
It is a very classy verb used by various poets and people of higher status.
It was also made famous by rapper Tupac Shakur's "Pour out a little liquor" song which made various Afro-American L.A. gangsters use it while smoking weed and drinking liquor with their bitches in the club.
Person 1 : Yo wazzup man! Watchu u doin here sHHmokin' that weed all alone?
Person 2 : Imma just reminiscing mah good old days aZ a straight out G!
The act of using alcohol, especially rum and tequila, to try and remember something from the past. It is used on both happy and sad occasions by people with both elephant-like and poor memory.
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.