In Japanese, to bike around aimlessly and/or leisurely. Adapted from the Englush word, apparently.
The usual spelling for that in English is "puttering", but given the Japanese pronunciation of vowels, "ポ" is probably the closest approximation to the way it'd be pronounced.
Cinderella Girls Theater
劇場第1064『ポタ…リング?』
Theater Episode 1064 - Potter...ing?Producer told me to take some time off... butPotter...ing? What's that...? If only I just listened instead of losing it...You mean "bouldering"? It's a leisure sport where you climb cliffs!Our unit does it once in a while too♪Oh, could it be a form of training?Fu... Nao! If you take the cliffs lightly, you'll literally be on the rocks!Special cliff climbing training... That gets me fired up!That's it-- I was too easygoing... I need to self-reflect! I'm getting pumped up-! Time for some hot-blooded fighting spirit!That dayI was sure it would be a mountain, but... Of course it's the ocean cliffs! I should've known!Let's do this... Where's the cliff I'm supposed to challenge!?Kamiya Nao really got in the hot-blooded manga spirit! After this she realized her mistake and turned bright red!!