From Longman Dictionary of Contemporary Englishmake off with something phrasal verb informalSTEALto steal something and take it away with you Thieves broke into the school and made off with computer equipment worth £40,000. → make→ See Verb table
Examples from the Corpus
make off with • Biggs and 16 others made off with $ 7. 3 million in the 1963 holdup.• He might have been a monster ready to make off with me.• I urged them both on, one of them made off with the ball and I threw the next one.• And what, I suggested, if a mugger made off with the can?• This is the chance Lapidoth has waited for; he makes off with the ring and is never seen again.• Had the hacker made off with the source code of any products?• Pond purloined: A Scarborough school's nature garden has been scuppered by thieves who made off with their fish pond.• They even stayed overnight before making off with their haul. 