てまえみそ

手前味噌
self-flattery
sing one's own praises

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てまえみそ【手前味噌】

〔自慢〕 self-glorification[-praise, -admiration, -flattery].

●いささか手前味噌だが… I may be flattering myself, but…; …though I say it myself; at the risk of blowing my own trumpet….

●手前味噌を言う[並べる] sing one's own praises; blow one's own trumpet; flatter [praise] oneself; call one's geese swans.