泡

pāo
  1. puffed; swollen; spongy
  2. small lake (esp. in place names)
  3. classifier for urine or feces

CEDICT

Classifier for

尿 niào
  1. to urinate
  2. urine

classifier: 泡

Homographs

泡 pào
  1. bubble; foam
  2. blister
  3. to soak; to steep; to infuse
  4. to dawdle; to loiter
  5. to pick up (a girl)
  6. to get off with (a sexual partner)
  7. classifier for occurrences of an action
  8. classifier for number of infusions