soaker pad

Etymology
From, due to the absorbent pad's purpose of soaking up liquid.

Noun

 * 1) A waterproof mattress topper, especially one intended for urine (i.e. unpotty-trained or incontinence); a bed protector.
 * 2) A diaper insert, especially a booster pad.
 * 1) A diaper insert, especially a booster pad.
 * 1) A diaper insert, especially a booster pad.
 * 1) A diaper insert, especially a booster pad.
 * 1) A diaper insert, especially a booster pad.
 * 1) A diaper insert, especially a booster pad.