Syllable division and stress derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
slouchingly is an adverb meaning "with a slouching gait or posture". It carries one recorded sense.
with a slouching gait or posture
“he stood slouchingly at the garden gate”
Definitions, synonyms and semantic relations for slouchingly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.