free flow of water; random talk; nonsense
Describes something coming out freely or without restraint. For water, it means gushing or flowing out uncontrollably. For speech, it means talking on and on, often without coherence or substance.
When I turned on the tap, water gushed out freely.
His talk was just random rambling, and I couldn't tell what he wanted to say.
Compound of 出 (de, 'coming out') + 放題 (hōdai, 'as much as one likes'). The combination yields the sense of something emerging without restraint.