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1.
get active and get busy
Lets go, move it, up an at 'em.
by Light joker January 12, 2007
 
2.
A foreshortening of "up and at them". An english colliquial (possibly London-based) phrase. Origins probaly extracted from comic or cartoon strip: "Up an at them Atom Ant" (1960's). Now used to rally lovers and friends to face the day and the 'enemy' of repetitive city life, corporate slavery, hang-over mornings, and intended to strike optimism and place energy and intent (with emphasism) into one's colleague.
Mobile text: "Up an at em baby".
Pre-nervous task: "Up an at 'em"
by Maurice Smith December 22, 2004