Sie sind lustig - formal
Du bist lustig - informal
Bist du lustig? - 'Google Translates' Translation (== "Are you funny?")
The suggestions above refer to the literal meaning, the statement that someone is an amusing person. Another meaning of "you are being funny" is that of "you are pulling my leg" or "you are weird." This might best be translated with "Du machst Witze," although a better translation for "pulling someone's leg" exists as "jemanden auf den Arm nehmen."
Added : Sie sind komisch.
not (funny) ---> nicht (lustig)
Ich bin fünfzehn, und ich bin sehr witzig.
funny things = lustige Sachen; komische Sachen
Very funny- Muy cómico
English: "interesting" is German: "interessant".
zu witzig zu komisch
wie ist das lustig is the translation in German. It is translated from English to German. German is mostly spoken in the European countries.
lustig = funny in German
das ist so lustig is the translation in German. It is translated from English to German. German is mostly spoken in the European countries.
an-greannmhar
"funny" in German has quite a few but "komisch" is the most fitting. Also: lustig, drollig. Note that lustig also means merry. See link below.
Today was funny = es war lustig heute; heute war ein lustiger Tag.