oTxo
Textual representation of a bicycle (in much the same way  =^..^=  is a cat).

The lowercase-"o"'s depict the front and rear wheels, where the uppercase-"T" stands in for handlebars. The lowercase-"x" represents the frame, seatpost, and rear attachments.
Dude:  Where are you going?
Dudette: Out for a quick ride on my bicycle: oTxo .... catch you later.
Dude: You're actually going outside?