(n.) The unconventional act of hastily concealing a personal item—such as used a sex toy—by wrapping it in a white terry cloth towel, resembling a burrito. Often employed during moments of unexpected intrusion or sheer panic.
"When her roommate barged in unannounced, she quickly made a Tuna Burrito with her vibrator and hid it in her night stand."
"Bro, I swear I wasn't snooping, but I saw a Tuna Burrito in the laundry basket. Awkward."