Citations:sidewall

Verb: to sneak into a (circus) tent by crawling under the wall

 * 1985 December 15, Jeff O'Neill, Ballyhoo [video game], Infocom:
 * Side-walling—crawling in under the canvas wall—is the last resource of local urchins who can't even afford the blues.
 * 1985 December 15, Jeff O'Neill, Ballyhoo [video game], Infocom:
 * Side-walling—crawling in under the canvas wall—is the last resource of local urchins who can't even afford the blues.