slang A surprising, unexpected, or deceptive swap, change, variation, or reversal. I'll distract the guards while you make a switcheroo with the fake diamond. The politician had been campaigning for months against the legislation, only to pull the old switcheroo and start putting her support behind it at the last minute.

slang A surprising, unexpected, or deceptive swap, change, variation, or reversal. "Old" is sometimes stylized as "ol'." The politician had been campaigning for months against the legislation, only to pull the old switcheroo and start putting her support behind it at the last minute. Wait a minute, you're Lisa, not Linda! Ah, you've pulled the ol' switcheroo on Grandpa.