1) The term short for thing-a-ma-jigger that indicates an object whose name is either not necessary in the context or not remembered by the speaker.
2) A low-profile jig that Mick Jagger does when he wakes up on a sunny morning that promises to by a good day.
1) Hey, pass me that... umm.. majigger over there please.
2) No footage has actually been taken of him doing the majigger, but I swear it exists.
verb (majiggered, majiggering, majiggers) - to monkey around with something--usually when you don't really knowwhat you're doing. Comes from the word thingamajigger, where 'majigger' is the function of the 'thing' you're talking about. The unknown/strange action for the unknown/strange object.
The time machine I bought on ebay wasn't working, so I had to majigger with the flux capacitor thing to get it working.
Dude: What does that thing do?
Dudette: It majiggers stuff.