What does greeshda mean?

greeshda is a very bad Word. In English it migh not sound very bad,but if your German lke me it is extreamly inepropiate.you know cussing right.dam,hell,fu*k,sh*T yeah its the worst in Poland and pretty bad in Germany.if you say it in Poland they will toss you in jail for two years.its like porneography.very detaled sex.please never say it and don't go telling your parents thatyou now know what porneography is.