a snapchat picture (technically like a nude) that guys ask you to send. but its way more enjoyable then a titty pic.
guy: send a arch snap
girl: okay
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used for the word "moan" but in a secret language for your bsf.
me: the boys in my class keep on.. wait my mom is right there. they kept on blehing in my ear and it was annoying
bsf: omg that would of been so annoying if. they blehed in my ear