pissabed

• piss-the-bed

From piss +‎ bed, so called after the dandelion's supposed diuretic effect. Compare French pissenlit.

pissabed (plural pissabeds)

1. The dandelion, formerly much used for its diuretic properties. [from 16th c.]
   • 1953, Samuel Beckett, Watt:

     Of flowers there was no trace, save of the flowers that plant themselves, or never die […] The chief of these was the pissabed.

   • 2016, Alan Moore, Jerusalem, Liveright 2016, p. 139:

     The tufted hillock […] had no buildings on and only golden clumps of piss-the-bed that were not yet gone into misty balls of seed.

2. (dialectal) Any of various other wild plants with diuretic properties; bluet, oxeye daisy, etc.

• bedwetting