Entry 2 senses · 2 variants Webster, 1913 Sludger · Sludg·er · IPA n. n. 01 n. A shovel for sludging out drains, etc. 1. A shovel for sludging out drains, etc. 02 n. A bucket for removing mud from a bored hole; a sand pump. 1. A bucket for removing mud from a bored hole; a sand pump.