Top Definition
The act practiced by squaddies in the presence of a camera & an unaware victim.

Victim is usually busy manning a phone or working on equipment, camera is filming said victim (either knowingly or non), victim is approached by the "air bummer", "air bummer" begins simulating sex motions without touching or alerting the victim that they are being "air bummed", hilarity ensues, victim humiliated, video is usually posted on the internet.

In extreme cases the "air bummer" will be joined by multiple wingmen and all will start bumming each other, sometimes forming a "bumming train".
Best air bumming examples are found on well known video websites.
by thegreendeath July 23, 2009

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